* {
    padding: 0;
    margin: 0;
}

#global {
    background-position: center;
    background: url("/images/wr.png");
    height: 100%;
    width: 100%;
    background-size: cover;
    position: fixed;
    opacity: 0.3;
}

.mask {
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    background: rgba(0, 0, 0, .3);
    position: fixed;
}

.nav {
    height: 50px;
    background-color: rgb(250, 250, 250);
    position: relative;
    margin-bottom: 50px;
    line-height: 50px;
    padding-left: 50px;
    font-weight: 700;
    border-bottom: solid 1px rgba(0, 0, 0, .1);
}

.logout {
    width: 50px;
    height: 50px;
    background-color: #F7F2EB;
    position: absolute;
    top: 0;
    right: 0;
    text-align: center;
    line-height: 50px;
    text-decoration: none;
    border-left: solid 1px rgba(0, 0, 0, .1);
    border-radius: 5px;
    transition: all 1s;
}

.logout:hover {
    cursor: pointer;
    text-decoration: underline;
    background-color: black;
    color: white;
}

.title {
    position: relative;
    text-align: center;
    font-size: 50px;
    color: black;
}

.img-container {
    width: 200px;
    height: 200px;
}

.img-container img {
    margin-top: 40px;
}

.card-container {
    text-align: center;
    height: 500px;
    width: 1000px;
    position: absolute;
    left: 50%;
    top: 50%;
    margin-top: -225px;
    margin-left: -500px;
}

.card {
    border-radius: 10px;
    overflow: hidden;
    margin: 100px 40px 100px 40px;
    display: inline-block;
    width: 200px;
    height: 300px;
    background-color: #D6F4F5;
    transition: all 2s;
}

.card:hover {
    cursor: pointer;
    background-color: #D3F9D1;
}

.text-container {
    margin-left: 10px;
    border-top: solid 2px black;
    font-weight: 700;
    width: 180px;
}

.sign-stu,
.sign-host {
    z-index: 1000;
    border-radius: 5px;
    background-color: #FFF2E9;
    width: 600px;
    height: 400px;
    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -300px;
    margin-top: -200px;
    text-align: center;
}

.x {
    cursor: pointer;
    position: absolute;
    font-size: 20px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: rgb(240, 240, 233);
    line-height: 30px;
    right: 2px;
    top: 2px;
}

.s-title {
    margin: 40px 0 20px 0;
}

.text-container div {
    height: 100px;
    text-align: center;
    line-height: 50px;
}

.item {
    margin-top: 30px;
    height: 70px;
    line-height: 70px;
}

.item label {
    position: absolute;
    left: 25%;
    font-size: 24px;
}

.item input {
    height: 28px;
    width: 200px;
}


.btn {
    margin-top: 40px;
}

.btn input {
    width: 100px;
    height: 35px;
}
